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Stainless Steel 17-7 |
Related Metals: |
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17-7 PH(tm)
AL 17-7(tm)
9RU10(tm) |
Specifications: |
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AISI 631
AMS 5528
AMS 5529
AMS 5568
AMS 5644
AMS 5678
ASTM A313 (631)
ASTM A564 (631)
ASTM A579 (631)
ASTM A693 (631)
ASTM A705 (631)
DIN 1.4568
MIL S-25043
UNS S17700 |
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Chemistry Data |
Aluminum |
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0.75 - 1.5 |
Carbon |
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0.09 max |
Chromium |
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16 - 18 |
Iron |
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Balance |
Manganese |
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1 max |
Nickel |
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6.5 - 7.75 |
Phosphorus |
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0.04 max |
Silicon |
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1 max |
Sulphur |
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0.04 max |
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General Information |
Principal Design Features |
A precipitation hardenable chromium-nickel-aluminum stainless steel combining high strength, moderate corrosion resistance and properties well suited for flat springs. |
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Applications |
Used for applications requiring good strength, corrosion resistance and mechanical properties up to 800 F in service. It is often used for very detailed, intricate parts due to its low distortion in heat treatment. Very stable. Commonly found in a variety |
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Machinability |
Rated at 75 % of B1112. This alloy displays long gummy chips that require chip breakers to overcome. Slow speeds and constant feeds are recommended for best results. |
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Forming |
Forming characteristics of this alloy are similar to 301 stainless steel. Intermediate annealing may be necessary for radical forming operations. |
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Corrosion Resistance |
Not suitable for use in marine applications. Resistant to a wide variety of dilute acids, fresh water and atmosphere. Superior to standard heat treatable chromium stainless steels, it approaches 301 and 302 stainless corrosion resistance. Resistant to liq |
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Welding |
Most common arc and resistance methods have been successfully employed with 17-7 PH. It is recommended that inert gas shielding be employed during fusion welding to reduce the oxidation of aluminum during the process. Pre-heating and post-weld annealing a |
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Heat Treatment |
CONDITION C - Results from heavy cold working (generally 45-50% reduction) of solution treated material. CONDITION CH900- Heat Condition C material to 900 F(482 C), hold for 1 hour, air cool. CONDITION A1750- After fabrication, heat solution treated mater |
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Cold Working |
In Condition A, this material can be easily formed using most common procedures. |
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Annealing |
1950 F (1066 C) for 3 minutes for each .1 inch (2.5 mm) of thickness, air cool. |
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Aging |
Solution anneal at 2150 F for 4 hours and air cool. Follow with 1975 F for 4 hours and air cool, then 1550 F for 24 hours, air cool and 1400 F for 16 hours, air cool to complete precipitation hardening process. Resistant to liquid oxygen and hydrogen an |
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Physical Data |
Density (lb / cu. in.) |
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0.282 |
Specific Gravity |
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7.81 |
Specific Heat (Btu/lb/Deg F - [32-212 Deg F]) |
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0.11 |
